$ git clone -n https://src.fedoraproject.org/rpms/plasma-mobile.git /var/lib/mock/f41-build-side-1-3128639-39569/root/chroot_tmpdir/scmroot/plasma-mobile
Cloning into '/var/lib/mock/f41-build-side-1-3128639-39569/root/chroot_tmpdir/scmroot/plasma-mobile'...
$ git fetch origin a54422071267119dfef76a8e203e587036adfb8d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plasma-mobile
 * [new ref]         a54422071267119dfef76a8e203e587036adfb8d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a544220 6.2.3